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Re: eglot and tramp

From: Michael Albinus
Subject: Re: eglot and tramp
Date: Tue, 15 Nov 2022 20:46:05 +0100
User-agent: Gnus/5.13 (Gnus v5.13)

Brian Cully <bjc@spork.org> writes:

Hi Brian,

>> It is on my TODO to check how well Tramp is integrated with eglot. Great
>> to hear that it seems to work flawless, but I believe there might be
>> some hints for performance improvement, like setting
>> "direct-async-process" connection property.
> I wouldn't go so far as to say "flawlessly". It does often run into the
> "forbidden re-entrant call to Tramp" problem, but that's not unique to
> Eglot, and it doesn't seem to cause any problems other than an annoying
> message periodically in the echo area.

Yes, this is an open problem. I hoped to fix it by using threads in
Tramp, but this has other problems.

> Otherwise it works pretty well. I've been using it like this for years,
> and am pretty happy with it.

Great! Since you are a regular eglot+Tramp user, could I ask you for a

I assume you are using Tramp with ssh or scp. If you also don't use a
password (for example via public key authentication), please try the
following setting:

--8<---------------cut here---------------start------------->8---
(add-to-list 'tramp-connection-properties
             (list (regexp-quote "/ssh:user@host:")
                   "direct-async-process" t))
--8<---------------cut here---------------end--------------->8---

"/ssh:user@host:" must be adapted of course, and you must set this prior
opening a connection to this remote path. This should give you better
performance when starting the language server.

Does it work for you? Does it make a difference?

> -bjc

Best regards, Michael.

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